spider {mvpart}R Documentation

Spider Data

Description

The spider data frame has 28 rows and 18 columns. The first 12 columns are abundances of different species of spiders and the next 6 are environmental data.

Usage

data(spider)

Format

This data frame contains the following columns:

arct.lute, pard.lugu, zora.spin, pard.nigr, pard.pull, aulo.albi, troc.terr, alop.cune, pard.mont, alop.acce, alop.fabr, arct.peri
numeric vectors giving the abundances of 12 species of spider
water, sand, moss, reft, twigs, herbs
numeric vectors giving the values of 6 environmental characteristics

Source

Van der Aart, P. J. and N. Smeeck-Enserink. 1975. Correlations between distributions of hunting spiders (Lycosidae, Ctenidae) and environmental characteristics in a dune area. Netherlands Journal of Zoology. 25:1-45.

These data were analysed using multivariate trees in De'ath, G. 2002. Multivariate Regression Trees: A New Technique for Modelling Species-Environment Relationships. Ecology. 83(4):1103-1117

Examples

data(spider)
fit<-mvpart(as.matrix(spider[,1:12])~water+twigs+reft+herbs+moss+sand,spider)
summary(fit)

[Package mvpart version 1.2-6 Index]